J. Amrit, V. Luzik, K. Niemchenko, Ye. Niemchenko, A. Tonkonozhenko, and T. Vikhtynska, Phonon transmission across superfluid helium-solid interfaces using intermediate antireflection nanolayers , Low Temp. Phys. 52, (2026) [Fiz. Nyzk. Temp. 52, 461–466, (2026)].